# hashgraph-online/standards-sdk

The official HOL Standards SDK, implementing the standards found in https://hol.org/docs/standards

Repository: https://github.com/hashgraph-online/standards-sdk
Canonical: https://ross.abutalabs.com/products/standards-sdk
Homepage: https://hol.org
Language: TypeScript
License: Apache-2.0
License Family: permissive
Topics: hedera, hedera-hashgraph, agents, ai, mcp-servers
Last push: 2026-09-02T16:17:08+00:00

## Health v2 (maintenance only)
Score: 88/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 100, longevity 39
- inputs: {"age_days": 547, "days_push": 0, "days_rel": 0, "gap_med": 0.5, "n_releases_24m": 17}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1160, forks 20 (observed 2026-09-03T02:15:12.635165+00:00)

## What it is
The official HOL Standards SDK for TypeScript, providing reference implementations of Hashgraph Consensus Service (HCS) standards for file storage, topic registries, agent identity, and agent communication on Hedera. It includes a Registry Broker client for searching, registering, and verifying AI agents, MCP servers, and skills.

## Use cases
- build AI agents that communicate over Hedera Consensus Service
- register and discover AI agents in a public agent registry
- store and retrieve files on-chain with HCS-1
- create verifiable agent identities with UAID
- verify skill ownership via DNS TXT domain proof
- build dynamic on-chain inscriptions (Hashinals)
- connect agents to MCP servers and registries

## When to choose
- you are building agents or dapps on Hedera that must follow HCS standards
- you need agent discovery, identity, or registry integration via the HOL Registry Broker
- you want TypeScript tooling for inscriptions, topic registries, or agent profiles on Hedera

## When to avoid
- you need a general-purpose Hedera client without HCS standards support (use @hashgraph/sdk directly)
- your project has nothing to do with Hedera or agent registries
- you need a minimal-footprint dependency and only want registry search (use the standalone @hol-org/rb-client instead)

## Facets
- artifact type: library
- maturity: active
- function: sdk, agent-framework, mcp, search-engine, auth, serialization, cli, developer-tools
- domain: artificial-intelligence, blockchain, developer-tools, apis
- platform: cli, cross-platform
- tags: hedera, hashgraph, hcs-standards, agent-registry, registry-broker, web3, inscriptions, agent-identity, uaid, hashinals, ai-agents, automation, nodejs, typescript

## Member repositories
- hashgraph-online/standards-sdk (main) score 88

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:12.635165+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:51:22.311684+00:00, confidence not recorded.
  - readme: https://github.com/hashgraph-online/standards-sdk (fetched 2026-09-03T02:15:12.635165+00:00, sha 7465f79a49b6)
  - homepage: https://hol.org (fetched 2026-08-29T12:53:39.615394+00:00, sha 7cf64f8435dc)
  - site_page: https://hol.org/docs/standards/hcs-1 (fetched 2026-08-29T12:53:39.626546+00:00, sha f2b4c6df5ae3)
  - site_page: https://hol.org/registry/docs (fetched 2026-08-29T12:53:39.624752+00:00, sha d7031e58587b)
  - site_page: https://hol.org/docs/libraries/standards-sdk (fetched 2026-08-29T12:53:39.628300+00:00, sha d791733fd9bf)
  - site_page: https://hol.org/docs (fetched 2026-08-29T12:53:39.629985+00:00, sha 24b17cda124f)
  - site_page: https://hol.org/about (fetched 2026-08-29T12:53:39.631582+00:00, sha afe02e774dcc)
- Data as of 2026-08-30T08:39:29.467469+00:00.